An electron ionization mass spectrometer is a machine that analyzes samples by measuring it's component's mass-to-charge ratios. Useful in environmental sciences to detect and identify pollutants and in chemical labs to analyze samples or determine purity, electron ionization mass spectrometers identify components of a sample by using their mass-to-charge ratios. In order to analyze a sample, it is vaporized and then an electron beam is focused on the vapor, to create ions from the samples atoms and/or molecules. The mass is measure by how far the ion travels and that data is converted into a spectrum that is unique to each compound. Because mass spectrometry destroys the sample, it is important that you know the sample volume needed for a given electron ionization mass spectrometer. Sensitivity levels and speed of analysis can also differ from one spectrometer to another.
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JEOL USA, Inc.
- EI / PI / CI / FI / FD / DCI / DEI
- Reflectron Time-of-Flight Mass Spectrometer, Direct MS mode
- 6000 m/z
Shimadzu
- Electron Ionization (EI)
- Quadrupole
- 1.5 to 1000 m/z
Shimadzu
- EI, CI, NCI
- Metal quadrupole with pre-rod
- 1.5 to 1090 m/z
Thermo Fisher Scientific
- APCI, H-ESI
- Orbitrap
- 350 to 20,000 m/z
Thermo Fisher Scientific
- APCI, H-ESI
- Hybrid Quadrupole / Orbitrap
- 50 to 6,000 m/z
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